Abstract: A defect detecting method for detecting whether or not an object to be measured has a defect comprises the steps of vibrating the object to be measured, picking up the vibration, and detecting that a spectrum of the characteristic vibration of the object to be measured is separated into two portions. Also, a defect detecting apparatus comprises a vibrator vibrating an object to be measured, a detector for picking up an vibration of the object to be measured and for converting the vibration into an electric signal, and a signal processor for receiving the electric signal from the detector, for analyzing a spectrum of a characteristic vibration of the object to be measured, and for determining whether the defect is present or absent depending on whether a spectrum of a defect of the object to be measured is present or absent.

Abstract: There is disclosed a noise eliminating device for an angle-modulated wave, in which a carrier amplitude fluctuation of an angle-modulated input wave is detected in a frequency difference detector to obtain a frequency variation signal corresponding to a frequency variation arising at an amplitude limiter from the carrier amplitude fluctuation. Noise caused by the amplitude fluctuation is eliminated from the angle-modulated input wave by subtracting the frequency variation signal from an output signal of the amplitude limiter after or before the frequency difference detector.

Abstract: A writing-pressure changing device for use in a recording device or the like in which when one end of a pen holder is caused to ascend by a device such as a plunger. In this device the pen holder is pivotally moved with respect to a pivot, so that a recording pen supported on the other end of the pen holder is caused to descend to be brought into contact with a recording surface to make a drawing. The writing pressure-changing device includes a first cylinder which has an inclined guide groove formed in a side wall thereof, and where the first cylinder is adapted to be mounted around the plunger; a second cylinder is slidably fitted in the first cylinder and has a switch lever formed on an outer peripheral surface of the second cylinder, the switch lever projects from the guide groove in the first cylinder, and the second cylinder is adapted to be mounted around the plunger. A spring is engaged with an inner side of an upper end of the second cylinder and carried by a lower end of the plunger.

Abstract: An automatic lapping device for polishing a surface of a magnetic drum of a magnetographic printing machine. The automatic lapping device comprises a lapping unit mounted on a carriage of a magnetic recording head, for polishing the magnetic drum surface, and the lapping unit includes a lapping sheet retainer movable between a stand-by position and an operating position, and thus, in the operating position, the lapping sheet held by the retainer is pressed against the drum surface with a constant pressure. To polish the drum surface, the magnetic drum is rotated by a recording motor and the magnetic drum surface is vertically scanned by the lapping unit while the retainer is in the operating position, utilizing a vertical scanning motor of the carriage, and after completing the vertical scanning, the retainer is moved to the stand-by position away from the drum surface. The lapping sheet is renewed automatically in response to the movement of the retainer from the operating position to the stand-by position.

Abstract: A mobile communication system including a plurality of radiotelephone base stations respectively covering a plurality of cells to define in combination a service area, a mobile unit capable of communicating with the radiotelephone base stations, and a radiotelephone control unit for connecting together each of the base stations and an ordinary telephone network, setting up and releasing a speech path between the each radiotelephone base station and the mobile unit, and adding a speech path for communication with another radiotelephone base station which is able to communicate with the mobile unit as it moves. The mobile unit is adapted to transmit and receive a plurality of channels at the same time so that it is capable of communicating with a plurality of radiotelephone base stations and registering its position to these base stations.

Abstract: A traveling-wave deflection system comprising a pair of deflectors disposed opposite each other across the path of an electron beam from an electron gun to a screen in a cathode-ray tube. Each deflector has a helical conductor wound around a core structure generally extending along the beam path. If made solely of an insulating material as in the prior art, the core structures would be electrified in use of the CRT, with the consequent deflection defocusing and bright line displacement. Therefore, in order to avoid electrification, the core structures are each enveloped in an antielectrification layer of a conducting material having a higher resistivity than the helical conductor. An embodiment is also disclosed wherein the core structures are wholly of conductive material.

Abstract: An apparatus for translating an optical image, as of a waveform, created by an electron beam device such as a cathode-ray tube into an electric signal. A fiber optics faceplate, having a multiplicity of optical fibers laid parallel to one another, is held against the CRT screen for transmitting the optical image to an image sensor such as that comprised of charge-coupled devices. Although preferable to optical lens systems because of far less transmission loss, the fiber optics faceplate has been susceptible to the irregular electrification of its light-exit surface, resulting in the appearance of starlike bright dots upon image reproduction from the output from the image sensor. Such irregular electrification is avoided by providing a transparent layer of electrically conducting material between the fiber optics faceplate and the image sensor.

Abstract: An electrophotographic plate-making machine including a light source and a movable copy holder forming a scanning exposure system for focusing a light at a focus region. A first electric motor is connected to the copy holder, and a sensitive paper is conveyed by a plurality of conveying rollers. Two of the conveying rollers are arranged at the focus region in series with the remaining conveying rollers. A second electric motor is connected to the conveying rollers and a third electric motor is connected to the focus region rollers. Accordingly, the first, second and third electric drive motors, respectively, can move the copy holder, the conveying rollers and the focus region rollers independently of each other, so that a first scanning exposure can be carried out on one portion of a sensitive paper and a second scanning exposure can be carried out on the remaining portion of the sensitive paper.

Abstract: A DC amplifier includes first and second transistors, an emitter resistor, and a load resistor. The first and second transistors constitute a differential amplification transistor pair. The emitter resistor is connected between the emitters of the first and second transistors. The load resistor is connected between the collectors of the transistors. The resistance of the load resistor is set to be 1/2 that of the emitter resistor. The emitters of third and fourth transistors equivalent to the first and second transistors are series-connected to the collectors of the first and second transistors through the load resistor. The biases of the third and fourth transistors are set to be close to those of the first and second transistors.

Abstract: There is disclosed a data circuit-terminating equipment (DCE) which connects a start-stop synchronous data terminal equipment (DTE) which is not synchronized with a PCM transmission line having various speeds. Further the DCE can satisfy recommendations of the V25 bis of CCITT. The DCE includes a start-stop synchronizing circuit to deliver a sampled request-to-send signal RS, a sampled send data and to transmit a clear-to-send signal CS to the DTE, a PLL obtaining a clock from the line, a timing generator generating timings for circuits, a mapping circuit mapping to make the sampled send data match into the line speed, a sending register converting transmission speed of the mapping circuit output to send to the line at the instructed period, a receiving register receiving data from the line to deliver data with the required speed during the required period for the DTE, and a demapping circuit receiving the receiving register output to demap and send to the DTE.

Abstract: A life of a starting liquid developer for electrostatic photography is prolonged by using a supplemental developer that returns an electrically charged state of the developer varied by repeated use of the developer to an original or appropriate state of the electrical charge for electrostatic photography.

Abstract: A display circuit of an oscillscope to switchingly display waveforms and characters has substantially no fluctuation phenomena caused by switching waveforms and characters. Each driving amplifier for waveforms and characters is employed to drive a final stage amplifier of which outputs are applied to deflection plates of a CRT. As a driving amplifier is not used in common to amplify waveforms and characters, clear waveforms and characters are observable without fluctuations.

Abstract: An electrical connector includes contacts to be connected to lead wires and a housing having apertures for receiving the contacts. The lead wires are connected to the contacts when the contacts are forced into the apertures of the housing. Each of the contacts comprises at one end a contact element to be in contact with an external terminal and at the other end a connection portion formed with a lead aperture through which a lead wire passes and with a slit continuous with the lead aperture. Edges of the slit pierce into an insulating coating of the lead wire and connect with a core of the lead wire under pressure.

Abstract: There is disclosed a data circuit-terminating equipment (DCE) which connects an asynchronous data terminal equipment (DTE) with a PCM trnsmission line having various speeds. Further the DCE can satisfy recomendations of the V25 bis of CCITT. The DCE includes a PLL obtaining a clock from the line, a timing generator generating timings for circuits, a mapping circuit mapping to make data from the DTE match into the line speed, a sending register converting transmission speed of the mapping circuit output to send to the line at the instructed period, a receiving register receiving data from the line to deliver data with the required speed during the required period for the DTE, and a demapping circuit receiving the receiving register output to demap and send to the DTE.

Abstract: A telecommunications network such as a key telephone system having n terminal devices such as telephone sets which are notionally divided into m groups, for the time division multiplex transmission and reception of m groups of n channels of data, where n is at least six and m is at least three. The invention particularly features a method of, and apparatus for, demultiplexing the multiplex data signal prior to reception by the terminal devices. The multiplex data signal is such that the n channels of data are assigned respectively to a set of n consecutive time slots making up one frame. Under the direction of a control circuit the multiplexed m groups of n channels of data are written onto m groups of n demultiplexing shift registers, respectively, at a relatively high speed.

Abstract: A microprocessor emulation apparatus for debugging a microprocessor of an electronic system without utilizing an interrupt signal and a stop signal to temporarily stop an operation of the system. The apparatus makes the system execute a program in the apparatus for reading and modifying contents stored in the system without using of control signals from the system by exchanging buses of the system to bus means of the apparatus to produce a pseudo stopping state, whereby the pseudo stopping state does not make the system execute a stored program of the system and which provides an analysis state which causes the system to execute the program in the apparatus.